National Museum of Nuclear Science & History
Helen Warren worked for the Edenfield Electric Company.
Robert Penneman was an American chemist. Penneman was born in 1919 in Springfield, Illinois. He received a B.
Harold Hoover was a member of the Special Engineer Detachment during the Manhattan Project. He worked as a filter foreman at the Y-12 Plant, but his real job was in counterintelligence, to ensure no sabotage occurred.
